A method for manufacturing a steerable instrument (10) for endoscopic and/or invasive type applications, the instrument comprising an elongated tubular body (18) having a proximal end part (11), a distal end part (13) and an intermediate part (12) between proximal and distal end parts, the proximal end part having at least one actuation proximal zone (14, 15). The distal end part has at least one flexible distal zone (16, 17), and the elongated tubular body is configured such that a movement of an actuation proximal zone is transferred to a corresponding flexible distal zone for a corresponding movement thereof. The elongated tubular body comprises an inner cylindrical element (101), an outer cylindrical element (104) and at least one intermediate cylindrical element (102, 103) having longitudinal elements (4) and provided between the inner and outer cylindrical elements. Inner, outer and intermediate cylindrical elements are coupled such that movement of an actuation proximal zone is transferred by the longitudinal elements of one of the intermediate cylindrical elements to a corresponding flexible distal zone. Adjacent longitudinal elements of an intermediate cylindrical element are releasably or flexibly attached, for instance, by fracture or flexure elements (7).L'invention concerne un procédé pour fabriquer un instrument orientable (10) pour des applications de type endoscopique et/ou invasif, l'instrument comprenant un corps tubulaire allongé (18) ayant une partie d'extrémité proximale (11), une partie d'extrémité distale (13) et une partie intermédiaire (12) entre des parties d'extrémité proximale et distale, la partie d'extrémité proximale ayant au moins une zone proximale d'actionnement (14, 15). La partie d'extrémité distale a au moins une zone distale souple (16, 17), et le corps tubulaire allongé est configuré de telle sorte qu'un mouvement d'une zone proximale d'actionnement est transféré à une zone distale souple correspondante pour un mouvement corres
